How is low voltage classified?

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lcsrks

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I understand that low voltage is considered to be 30 Volts RMS or 43.4 peak to peak. Would a system that produces 34 volts Peak to Peak square wave fall under the low voltage classification. This is an underground control system used in the landscape.
 
Classified according to what? (as far as the code is concerned or for licensing requirements)

The code is more concerned with the energy produced by a power source when considering circuits under Article 725.

If this is lighting, Article 411 would likely apply.

For licensing requirements, check your local state statutes.
 
I find it also depends on what you are used to working on as to whether it's low voltage or not. Linemen will tell you that we work on is low voltage.
 
The NEC does not use the term low voltage. If a low voltage system exceeds the limits for Art 725 it then uses a chapter 3 wiring method. Take a look at the following articles and note the titles
Art 725
Art 411
Art 720
All deal with "Low Voltage" but none use that title. The correct term is limited energy....
 
From what I can determine Article 411 states "operating at 30 volts (42.4 volts peak) or less. I'm trying to determine if my system which is operating at 34 volts peak square wave is under or over the limit. This 30 volts or less appears to be a limitation set by the NEC in general, as apperently any thing under 30 volts ac is generally not considered to be a shock hazzard. So is this classification based on 30 volts RMS or 42.4 peak?
 
Art 411 applies to a listed lighting system. It does not apply to a transformer, some luminaires and other parts assembled by the user. There is another part to the 30 volt rule, the power. Both have to be considered. Thats why the rules in Art 725 deal with VA.
 
lcsrks,

The piece of equipment that you are refering to has a voltage stamped on a

plate or written somewhere on the piece, that is the voltage!!!!
 
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